Endress+Hauser Deltatop DP71B Manual

TI441P/00/EN/09.09
71102952
Technical Information
Deltatop
DP71B, DP72B, DP73B
Differential pressure flow measurement with
Pitot tubes and Deltabar differential pressure transmitter
The universal measuring system for steam, gases and liquids
Application
• Flow measurement of gases, steam and liquids
• Nominal diameters from 2" to 21ft
• Nominal diameters from DN 50 to DN 6000
• Pressure up to 6300 psi (420 bar)
• NACE-compliant materials
Deltabar differential pressure transmitter
• Approvals for hazardous area:
FM, CSA, ATEX
• Relevant safety aspects: SIL
• Connection to all common process control systems:
HART, Foundation Fieldbus, Profibus
Your benefits
• Selectable according to the application:
– operational compact version: minimizes installation
costs
– modular remote version: for demanding process
conditions (high temperature, high pressure) and
difficult installation conditions
• Deltabar differential pressure transmitter ready
adjusted
• Display configured for flow rate, differential pressure
or 0 to 100%
• Robust design; no moving parts

Deltatop DP71B, DP72B, DP73B
2Endress+Hauser
Table of Contents
Function and system design. . . . . . . . . . . . . . . . . . . . . 3
Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Flow calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Sizing and optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
"Applicator" selection and sizing tool . . . . . . . . . . . . . . . . . . . . . . 5
Sizing sheet - data sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Selecting the differential pressure transmitter and the measuring
cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Temperature and pressure compensation . . . . . . . . . . . . . . . . . . . 6
Split range (expansion of the measuring range) . . . . . . . . . . . . . . . 8
Flow measurements in liquids or steam . . . . . . . . . . . . . . . . . . . . . 9
Flow measurement in gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Mounting positions . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Flow direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Gas measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Liquid or steam measurements . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installation and process conditions . . . . . . . . . . . . . . 12
Upstream and downstream lengths . . . . . . . . . . . . . . . . . . . . . . . 12
Homogeneity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Temperature, pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Practical limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Temperature limits of the materials applied . . . . . . . . . . . . . . . . . 13
Pressure-temperature curves for flanges according to
ANSI B16.5-2003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Mechanical construction . . . . . . . . . . . . . . . . . . . . . . 16
Probe profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Design, dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Process connection, mounting nozzle . . . . . . . . . . . . . . . . . . . . . 24
Extension welding socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
End support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Differential pressure connection . . . . . . . . . . . . . . . . . . . . . . . . . 25
Integrated temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Overview of the product structures . . . . . . . . . . . . . . 27
Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . 29
Product structure Deltatop DP71B . . . . . . . . . . . . . . . . . . . . . . . 29
Product structure Deltatop DP72B . . . . . . . . . . . . . . . . . . . . . . . 32
Product structure Deltatop DP73B . . . . . . . . . . . . . . . . . . . . . . . 36
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Deltatop DA73V: shut-off valve (accessory) . . . . . . . . 41
Version: valve (DA73V-6...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Deltatop DA73M: manifold (accessory) . . . . . . . . . . . 42
Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Version: 3-valve, manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Version: 5-valve, manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Version: 3-valve, manifold, IEC61518, both sides . . . . . . . . . . . . 45
Version: 5-valve, manifold, IEC61518, both sides . . . . . . . . . . . . 46
Product structure DA73M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Product structure DA73V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Purge unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
System design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Sizing sheet - data sheet . . . . . . . . . . . . . . . . . . . . . . 49
Instructions for completing the sizing sheet - data sheet . . . . . . . 51

Deltatop DP71B, DP72B, DP73B
Endress+Hauser 3
Function and system design
Measuring principle
P01-DPxxx-15-00-00-xx-002
The front of the Pitot tube is exposed to the static pressure pstat plus the dynamic pressure pdyn. The side and
the back of the tube are exposed only to the static pressure pstat. The resulting differential pressure Δpcan
be used to calculate the flow rate Q.
The relationship between flow rate (Q) and differential pressure (Δp) is given by a square root function:
P01-DOxxxxx-15-xx-xx-xx-008
Downstream of the Pitot tube the static pressure pstat is reduced by the permanent pressure loss Δω. With Pitot
tubes, this pressure loss Δω is much less significant than with other primary elements.
++
––
Dp
p+p
dyn stat pstat
pΔ
Q~

Deltatop DP71B, DP72B, DP73B
4Endress+Hauser
Flow calculation According to the continuity law derived by Bernoulli and the energy equation, the static pressure in the flow
plus the dynamic pressure is equal to a constant throughout the flow:
pstat + pdyn = const.
From this law, the following flow equations can be derived:
Volumetric flow for gases under standard conditions
Volumetric flow for gases under operating conditions
Mass flow for gases and steam
Mass flow for liquids
Volumetric flow for liquids
Definition of the symbols
Symbol Quantity Unit
Δp Differential pressure at the probe profile Pa
ρnMedium density at standard conditions kg/m3
ρbMedium density at operating conditions kg/m3
A Cross-sectional area of the pipe m2
b Width of the probe profile perpendicular to the flow direction m
k k-factor of the Pitot tube 1
κIsentropic exponent of the gas1)
1) The isentropic exponent is: 1.65 for monoatomic gases; 1.4 for diatomic gases; 1.28 for triatomic gases
1
PbOperating pressure Pa
PnAbsolute pressure of the gas at standard conditions Pa
QmMass flow kg/s
QvVolumetric flow m3/s
Qvn Volumetric flow at standard conditions m3/s
TbTemperature of the gas at operating conditions K
TnTemperature of the gas at standard conditions K
ZbReal gas factor at operating conditions 1
ZnReal gas factor at standard conditions 1
εExpansion factor 1
2pD
r
Q=kAe
vn
P
b
Z
T
nn
P
n
Z
T
bbn
2pD
r
Q=kAe
vb
2pDr
mkAeb
Q=
2pDr
mkA b
Q=
2pD
r
Q=kA
vb

Deltatop DP71B, DP72B, DP73B
Endress+Hauser 5
Sizing and optimization The exact relationship between differential pressure, flow and pressure loss is described by the k-factor, which
depends on the shape and size of the Pitot tube.
The k-factors of the Deltatop Pitot tubes have been determined and verified in elaborate sample calibrations.
Every Pitot tube is shipped with a calculation sheet. The differential pressure, pressure loss, application limits
and further parameters are calculated based on the customer specifications. For this purpose, a form (Sizing
sheet - data sheet, →ä49) has to be completed. The user does not have to be involved in complicated sizing
calculations.
"Applicator" selection and
sizing tool
Endress+Hauser's Applicator software is a convenient selection and sizing tool for planning processes (for
details, see booklet IN013F). The Applicator program is available free of charge either in the form of a CD or
can be downloaded from the Internet at:
http://www.products.endress.com/applicator
Applicator Sizing Flow
The "Applicator Sizing Flow" module calculates all necessary data for the selected primary device:
• Differential pressure
• Pressure loss
• Measuring uncertainty
• k-factor
• Upstream and downstream straight lengths
• Pressure ratings
• Medium parameters
Additional options
• Sizing sheet - data sheet
• Sizing sheet - calculation sheet
• Determination of the mounting position
Sizing sheet - data sheet To ensure that the Deltatop measuring point exactly matches the requirements of the process, the completed
"Sizing sheet - data sheet" (→ä49) has to be attached to the order.
Endress+Hauser uses the data in this form to determine the optimum configuration of the measuring point.
The "Sizing sheet - data sheet" can be generated by the "Applicator" selection and sizing tool.
Selecting the differential
pressure transmitter and the
measuring cell
If they are ordered together with the primary element, it is possible to order the Deltabar differential pressure
transmitter with a suitable measuring cell and calibration even without knowing the complete calculation data.
Endress+Hauser will select the most suitable measuring cell based on the calculation results for the Pitot tube.
The differential pressure transmitter will be delivered completely configured and preadjusted to the calculated
values.
This allows easy and convenient ordering and commissioning of the measuring point even for less experienced
users.
Deltabar S PMD70/PMD75
Deltabar M PMD55
Feature of the product structure Option to be selected
40: "Nominal Range; PN" Depending on working pressure PN:
• 78: "Prepared for Deltatop; PN = 2321 psi (160 bar)"
• 88: "Prepared for Deltatop; PN = 6092 psi (420 bar)" (only available for
PMD75)
50: "Calibration; Unit" 8: "Adjusted for Deltatop"
Feature of the product structure Option to be selected
070: "Sensor Nominal Value" 88: "Prepared for Deltatop"
090: "Calibration; Unit" 8: "Adjusted for Deltatop"

Deltatop DP71B, DP72B, DP73B
6Endress+Hauser
Temperature and pressure
compensation
Separate process connections
Two additional probes are required for temperature
and pressure compensation:
•An absolute pressure sensor
This sensor must be mounted on the upstream side
of the Pitot tube.
•A temperature probe
In order to avoid disturbances of the flow profile,
this probe must be mounted on the downstream
side of the Pitot tube. The minimum distance
between the Pitot tube and the temperature probe
is 3D.
(D: diameter of the pipe)
P01-DPPxxxxx-15-xx-xx-xx-007
1: Absolute pressure probe
2: Pitot tube and differential pressure transmitter
3: Temperature probe
4: Flow computer
123
4
RMC621
RMC621
Endress+Hauser
Endress+Hauser
DpT
p
3D
Combined process connection for absolute
pressure, differential pressure and temperature
• Versions of the Deltatop DP72B and DP73B units
are available with an integrated Pt100 temperature
probe
• In the case of Deltabar S, an adapter (e.g. oval
flange PZO) can be used to screw a pressure
transmitter or a pressure sensor into the Deltabar S
flange. The absolute pressure sensor must be
mounted at the "+" side of the Deltabar S.
P01-DP6xBxxx-14-00-00-xx-001
1: Deltabar S differential pressure transmitter
2: Integrated Pt100 temperature probe
3: Absolute pressure transmitter (has to be ordered
separately)
ENDRESS+HAUSER
CERABAR T
1
2
3

Deltatop DP71B, DP72B, DP73B
Endress+Hauser 7
Calculation of the compensated volume or mass flow
•For steam:
Flow and Energy Manager RMS621 for water and steam from Endress+Hauser;
for details see Technical Information TI092R
•For all media:
Universal Flow and Energy Manager RMC621 for gases, liquids and steam from Endress+Hauser;
for details see Technical Information TI098R
•For all media:
by a PLC;
In this case the compensation calculation has to be programmed by the user.
Calculation formula for temperature and pressure compensation
The starting point for compensation first has to be defined. The starting point is the calculation sheet which
accompanies every primary element. Layout data for a specific operating condition (pressure and temperature)
can be found on the calculation sheet.
The relationship between flow and differential pressure is described by a square root function:
for the mass flow (or volume flow at normal or standard conditions)
and
for the volume flow
where
ρ= the density of the medium.
If the current output of the Deltabar transmitter is set to flow values, the square root function is already
implemented. Otherwise the square root function must be computed externally, e.g. in a PLC. Please make
sure that the square root function is not applied twice.
Whenever the real operating conditions differ from the conditions used in the calculation sheet, the density of
the gas will change and thus also the calculated flow rate will change according to the above-mentioned
formula.
where
P = absolute pressure
T = absolute temperature (K)
Z = compressibility factor
1 = operating condition according to the calculation sheet
2 = operating condition currently measured
The compensation can now be computed as follows:
for mass flow (or volume flow at standard conditions)
for volume flow
The compressibility factor Z can be neglected if its value is close to 1. If the compressibility factor is to be
included in the compensation, the value must be determined according to the pressure and temperature
currently measured. Compressibility factors are available in the corresponding literature in tables or graphs or
can be calculated using the Soave-Redlich-Kwong procedure for example.
2pDr
m
Q=
2pD
r
Q=
v
rr=
21
P
P
T
T
Z
Z
21 1
12 2
Q=Q
21
P
P
T
T
Z
Z
21 1
12 2
Q=Q
21
P
P
T
T
Z
Z
12 2
21 1

Deltatop DP71B, DP72B, DP73B
8Endress+Hauser
Split range (expansion of the
measuring range)
The square root function has a very steep slope in the vicinity of the zero point. Therefore, the measuring range
is limited from below, which results in an operable flow range of typically 6:1 (max. 12:1).
If the differential pressure is high enough, it is possible to increase the range by connecting multiple differential
pressure transmitters with different measuring ranges.
The following Endress+Hauser devices can be used to evaluate the measuring signals simultaneously:
• Flow and Energy Manager RMS621 for water and steam (see Technical Information TI092R)
• Universal Flow and Energy Computer RMC621 for gases, liquids and steam (see Technical Information
TI098R)
!Note!
The maximum available operable flow range depends on the differential pressure available.
!Note!
The same method can be used to implement redundant measurements.
Example
P01-DPPxxxxx-15-xx-xx-xx-008
10 360
300
1800
Q
10
300
Q
50
Δp
Δp
RMC621
Endress+Hauser
Endress+Hauser

Deltatop DP71B, DP72B, DP73B
Endress+Hauser 9
Flow measurements in liquids
or steam
With liquid or steam applications, the transmitter must be mounted below the pipe. All impulse pipes must be
installed with a slope of at least 1:15 to the process connection - coming from the transmitter. This ensures
that trapped air and bubbles rise back to the process pipe and thus do not influence the measurement.
"Caution!
With steam applications, the differential pressure transmitter must be located at a sufficient distance to allow
for cooling to meet the transmitter specification. A typical cooling rate is 100 °F per foot (55 °C per 300 mm).
P01-DPxxxxxx-11-xx-xx-xx-005
A: Preferred configuration; B:Alternative configuration (requires less space; only possible for clean media)
1: Pitot tube; 2: Shut-off valves; 3: Three-valve manifold; 4: Deltabar differential pressure transmitter; 5: Separator;
6: Drain valves
Flow measurement in gases With gas applications, the transmitter must be mounted above the pipe. All impulse pipes must be installed
with a slope of at least 15:1 to the process connection - coming from the transmitter. This ensures that any
condensate flows back into the process pipe and thus does not influence the measurement.
P01-DPxxxxxx-11-xx-xx-xx-006
A: Preferred configuration; B: Alternative configuration (if the transmitter cannot be mounted above the pipe; only possible
for clean media)
1: Pitot tube; 2: Shut-off valves; 3: Three-valve manifold; 4: Deltabar differential pressure transmitter; 5: Separator;
6: Drain valve
+–
1
2
3
4
5
6
2
5
+–
1
2
3
5
6
2
4
5
AB
6
6
+–
1
2
3
4
A
1
3
2
B
4
+–
5
6
5
6
2

Deltatop DP71B, DP72B, DP73B
10 Endress+Hauser
Mounting positions
Versions Compact version
With the compact version of the Deltatop, the Pitot tube, the manifold and the transmitter are delivered ready-
mounted. Additional piping and additional valves are not required. Thus, leakage problems are eliminated.
Remote version
With the remote version of the Deltatop, the Pitot tube, the manifold, the shut-off valves and the transmitter
are delivered separately and must be mounted on site. This version is recommended:
• For high process temperatures which make direct transmitter mounting impossible.
• If the transmitter cannot be mounted directly at the Pitot tube due to space restrictions.
Flow direction • The flow direction is indicated by an arrow on the flange plate (compact version) or on the probe head
(remote version).
• "Mounting left" and "Mounting right" refer to the flow direction (see drawings below).
• For compact versions, the transmitter is mounted in such a way that the display can be read in the specified
mounting position and does not need to be rotated.
Gas measurements
Compact; vertical1) Compact; horizontal2) Remote; vertical Remote; horizontal
flow upwards
DP7xB-CV...
P01-DP61Dxxx-11-00-00-xx-001
mounting left
DP7xB-CB...
P01-DP61Dxxx-11-00-00-xx-007
upwards/downwards
DP7xB-BW...
P01-DP61Dxxx-11-00-00-xx-013
top/bottom
DP7xB-BD...
P01-DP61Dxxx-11-00-00-xx-016
flow downwards
DP7xB-CU...
P01-DP61Dxxx-11-00-00-xx-002
mounting right
DP7xB-CC...
P01-DP61Dxxx-11-00-00-xx-008
1) Recommended housing version for the Deltabar S: T14 (for use of the Deltabar display)
2) Recommended housing version for the Deltabar S: T15 (for use of the Deltabar display)

Deltatop DP71B, DP72B, DP73B
Endress+Hauser 11
Liquid or steam
measurements
Compact; vertical1) Compact; horizontal2) Remote; vertical Remote; horizontal
flow upwards
DP7xB-EV... (liquid)
DP7xB-GV... (steam)
P01-DP61Dxxx-11-00-00-xx-001
mounting left
DP7xB-EB... (liquid)
DP7xB-GB... (steam)
P01-DP61Dxxx-11-00-00-xx-009
upwards/downwards
DP7xB-DW... (liquid)
DP7xB-FW... (steam)
P01-DP61Dxxx-11-00-00-xx-014
top/bottom
DP7xB-DD... (liquid)
DP7xB-FD... (steam)
P01-DP61Dxxx-11-00-00-xx-017
flow downwards
DP7xB-EU... (liquid)
DP7xB-GU... (steam)
P01-DP61Dxxx-11-00-00-xx-002
mounting right
DP7xB-EC... (liquid)
DP7xB-GC... (steam)
P01-DP61Dxxx-11-00-00-xx-010
1) Recommended housing version for the Deltabar S: T14 (for use of the Deltabar display)
2) Recommended housing version for the Deltabar S: T15 (for use of the Deltabar display)

Deltatop DP71B, DP72B, DP73B
12 Endress+Hauser
Installation and process conditions
Upstream and downstream
lengths
In order to ensure a homogeneous flow profile, it is necessary to mount the Pitot tube at a sufficient distance
to narrowings or bends in the pipe. The required upstream and downstream lengths for different types of
obstacles are summarized in the following table:
Examples (schematic)
P01-DPxxxxxx-11-xx-xx-xx-008
1: Upstream length; 2: Downstream length;
a: 90° bend; b: Valve, open; c: 2x90° bend
Homogeneity The fluid must be homogeneous. Changes of the state of aggregation (liquid, gas, steam) are not
permissible.
The pipe must always be completely filled.
Temperature, pressure
Temperature and pressure may not be subject to large fluctuations.
If required, temperature and pressure compensation must be applied for gases and steam (→ä6).
Practical limits For a reliable measurement with Pitot tubes, the practical limits are shown in the table below. Equivalent dp
with the respective medium velocity.
Type of obstacle Min. upstream length Min. downstream length
90° bend 7 x D 3 x D
2x90° bend
in the same plane
9 x D 3 x D
2x90° bend
in perpendicular planes
18 x D 3 x D
Concentric reducer 8 x D 3 x D
Concentric expander 8 x D 3 x D
Ball/gate valve, fully open 24 x D 4 x D
D: Inner pipe diameter
12
a
b
c
Compact version Remote version
Max. temperature • For gases, liquids and steam:
390 °F (200°C)
•Withstandardmaterial:
approx. 800 °F (427 °C)
Max. pressure 6000 psi (420 bar)
Fluid Minimum DP Equivalent velocity
Gas 0.1" (2.5 mm) H2O 15 ft/sec. (4.5 m/sec.)
Liquid 1.0" (25 mm) H2O 2 ft/sec. (0.6 m/sec.)
Steam 1.5" (38 mm) H2O 32 ft/sec. (9.7 m/sec.)

Deltatop DP71B, DP72B, DP73B
Endress+Hauser 13
Temperature limits of the
materials applied
ASME/AISI/ASTM
Plastics
Other materials
!Note!
All temperature specifications are only guide values. The temperature limits have to be checked in each case.
Depending on the pressure and the medium, they may strongly deviate from these values.
Designation Short designation Material code Max. temperature Reference
Steels
C-Si A105 K03504 790 °F (425 °C) ASME B16.51)
1) Values for flanges: Maximum recommended temperature for permanent use or maximum temperature specification
of the pressure-temperature ratings.
Heat-resistant steels
C-1/2Mo A182 Gr. F1 K12822 860 °F (465°C) ASME B16.51)
1 1/4Cr-1/2Mo-Si A 182 Gr. F11 Cl.2 K11572 1090 °F (590 °C) ASME B16.51)
2 1/4Cr-1Mo A 182 Gr. F22 Cl.3 K21590 1090 °F (590 °C) ASME B16.51)
Stainless steels
18Cr-8Ni A 182 Gr. F304 S30400 1000 °F (538 °C) ASME B16.51)
16Cr-12Ni-2Mo A 182 Gr. F316 S31600 1000 °F (538 °C) ASME B16.51)
16Cr-12Ni-2Mo A 182 Gr. F316L S31603 840 °F (450 °C) ASME B16.51)
22Cr-5Ni-3Mo-N A 182 Gr. F51 S31803 600 °F (315 °C) ASME B16.51)
A 182 Gr. F904L N08904 700 °F (375 °C) ASME B16.51)
Designation Short designation Max. temperature Reference
PVC Polyvinyl chloride Up to approx. 150 °F (70 °C) Manufacturer
specification
PP Polypropylene Up to approx. 190 °F (90 °C) Manufacturer
specification
PE Polyethylene Up to approx. 170 °F (80 °C) Manufacturer
specification
PVDF Polyvinylidene fluoride Up to approx. 260 °F (130 °C) Manufacturer
specification
PTFE Polytetrafluorethylene Up to approx. 300 °F (150 °C) Manufacturer
specification
Designation Short designation Material code Max. temperature Reference
Monel 400 (S-)NiCu 30 Fe 2.4360 790 °F (425 °C) VdTÜV material data sheet
263
Hastelloy C4 NiMo 16 Cr 16 Ti 2.4610 750 °F (400 °C) VdTÜV material data sheet
424
Hastelloy C276 NiMo 16 Cr 15 W 2.4819 840 °F (450 °C) VdTÜV material data sheet
400
Alloy 625 NiCr 22 Mo 9 Nb 2.4856 1650 °F (ca. 900 °C) Key to steel1)
1) Values for forgings: Maximum temperature specification for fatigue strength and 1% creep limit.
Alloy 825 NiCr 21 Mo 2.4858 840 °F (450 °C) VdTÜV material data sheet
432

Deltatop DP71B, DP72B, DP73B
14 Endress+Hauser
Pressure-temperature curves
for flanges according to
ANSI B16.5-2003
Cl. 2500 /Cl. 1500
P01-DOxxxxxx-05-xx-xx-xx-003
Cl. 900 / Cl. 600
P01-DOxxxxxx-05-xx-xx-xx-002
0
50
100
150
200
250
300
350
400
450
0 50 100 150 200 250 300 350 400 450 500 550 T (°C)
P (bar)
A105 /Cl.2500
A182Gr.F1 / Cl.2500
316L / Cl.2500
A105 / Cl.1500
A182Gr.F1 / Cl.1500
316L / Cl.1500
0
20
40
60
80
100
120
140
160
0 50 100 150 200 250 300 350 400 450 500 550 T (°C)
P (bar)
A105 /Cl.900
316L / Cl.900
A182Gr.F1 / Cl.900
A105 / Cl.600
316L / Cl.600
A182Gr.F1 / Cl.600

Deltatop DP71B, DP72B, DP73B
Endress+Hauser 15
Cl. 300 /Cl. 150
P01-DOxxxxxx-05-xx-xx-xx-001
!Note!
The values for 316L refer to the 0.2% yield strength.
0
10
20
30
40
50
60
0 50 100 150 200 250 300 350 400 450 500 550 T (°C)
P (bar)
A105 /Cl.300
A182Gr.F1 / Cl.300
316L / Cl.300
A105 / Cl.150
A182Gr.F1 / Cl.150
316L / Cl.150

Deltatop DP71B, DP72B, DP73B
16 Endress+Hauser
Mechanical construction
Probe profile Developed from aerospace technology, the Deltatop averaging Pitot flow sensor provides unsurpassed accuracy
and reliability. With its solid one-piece construction and bullet shape, the Deltatop makes flow measurement
clog-free and precise. The unique sensor shape reduces drag and flow-induced vibration. The location of the
low pressure ports eliminates the potential for clogging, hence improving signal stability.
P01-DPxxxxx-15-xx-xx-xx-016
Design, dimensions Process connection: "Pipe > cutting ring"
P01-DP6xBxxx-06-00-00-xx-001
1: Device head
2: Tube fitting
3: Welding socket
4: Welding socket for end support (supplied if end support has been selected in the product structure)
5: Plug for end support (supplied if end support has been selected in the product structure)
!Note!
The wall thickness "W" and the inner diameter "ID" of the pipe have to be specified when ordering a Deltatop
measuring system.
W
ID
H
A
A
D
A-A
1
2
3
4
5
DP71B DP72B DP73B
ANSI rating Class 600 Class 300
Not available
Sensor diameter 7/16" (11 mm) 7/8" (22 mm)
Dim. "D" drilled hole diameter 1/2" (13 mm) 1" (25 mm)
Tube fitting size 5/8" tube x 3/4" NPT 1" tube x 1" NPT
Welding socket size 3/4" NPT 1" NPT
Dim. "H" 4.0" (102 mm) 5.5" (140 mm)
Pipe size "ID" 2" - 6"
(50 mm - 150 mm)
6" - 48"
(150 mm - 1200 mm)

Deltatop DP71B, DP72B, DP73B
Endress+Hauser 17
Process connection: "Pipe > spring lock"
P01-DP6xBxxx-06-00-00-xx-002
1: Device head
2: Load plate
3: Load springs
4: Visual load indication
5: Packing follower
6: Packing body
7: Welding socket
8: Indication ring
!Note!
The wall thickness "W" and the inner diameter "ID" of the pipe have to be specified when ordering a Deltatop
measuring system.
A
A
A-A
W
D
ID
H
1
2
3
6
5
48 7
DP71B DP72B DP73B
ANSI rating Class 600 Class 600 Class 600
Sensor diameter 7/16" (11 mm) 7/8" (22 mm) 1-3/8" (35 mm)
Dim. "D" drilled hole diameter 1/2" (13 mm) 1" (25 mm) 1-1/2" (39 mm)
Welding socket size 3/4" NPT 1" NPT 2" NPT
Dim. "H" 7.5" (191 mm) 10.2" (259 mm) 11.7" (297 mm)
Pipe size "ID" 2" - 6"
(50 mm - 150 mm)
6" - 42"
(150 mm - 1050 mm)
12" - 60"
300 mm - 1500 mm

Deltatop DP71B, DP72B, DP73B
18 Endress+Hauser
Process connection: "ANSI flange"
P01-DP6xBxxx-06-00-00-xx-007
1: Device head
2: Sensor flange
3: Spiral wound gasket
4: Weld neck flange
5: Welding socket
6: Welding socket for end support
7: Weld cap for end support
!Note!
The wall thickness "W" and the inner diameter "ID" of the pipe have to be specified when ordering a Deltatop
measuring system.
A-A
H
XID
A
A
W
D
1
2 3 4 5
6
7
DP71B DP72B DP73B
ANSI class1)
1) Classes 1500 and 2500 on request
• Class 150
• Class 300
• Class 600
• Class 150
• Class 300
• Class 600
•Class150
•Class300
•Class600
Sensor diameter 7/16" (11 mm) 7/8" (22 mm) 1-3/8" (35 mm)
Dim. "D" drilled hole diameter 1/2" (13 mm) 1" (25 mm) 1-1/2" (39 mm)
Flange size 1" 1-1/2" 2"
Pipe size "ID" 2" - 6"
(50 mm - 150 mm)
6" - 48"
(150 mm - 1200 mm)
12" - 192"
(300 mm - 5000 mm)
Dim. "X" • Class 150:
approx. 3.31" (84 mm)
• Class 300:
approx. 3.56" (90 mm)
• Class 600:
approx. 3.81" (97 mm)
• Class 150:
approx. 3.81" (97 mm)
• Class 300:
approx. 4.06" (103 mm)
• Class 600:
approx. 4.38" (111 mm)
• Class 150:
approx. 4.06" (103 mm)
• Class 300:
approx. 4.31" (110 mm)
• Class 600:
approx. 4.69" (119 mm)
Dim. "H" • Class 150:
approx. 6.7" (150 mm)
• Class 300:
approx. 7.3" (186 mm)
• Class 600:
approx. 7.8" (198 mm)
• Class 150:
approx. 7.9" (200 mm)
• Class 300:
approx. 8.4" (214 mm)
• Class 600:
approx. 9.1" (230 mm)
• Class 150:
approx. 9.3" (235 mm)
• Class 300:
approx. 9.8" (249 mm)
• Class 600:
approx. 10.6" (268 mm)

Deltatop DP71B, DP72B, DP73B
Endress+Hauser 19
Process connection: "Spring lock + flange"
P01-DP6xBxxx-06-00-00-xx-008
1: Device head
2: Load plate
3: Load springs
4: Packing follower
5: Safety spring lock packing body
6: Sensor flange
7: Spiral-wound gasket
8: Weld neck flange
9: Welding socket
10: Visual load indication
11: Indication ring
!Note!
The wall thickness "W" and the inner diameter "ID" of the pipe have to be specified when ordering a Deltatop
measuring system.
A
A
A-A
H
X
W
D
ID
1
2 3 45678 9
1011
DP71B DP72B DP73B
ANSI class • Class 150
• Class 300
• Class 600
• Class 150
• Class 300
• Class 600
•Class150
•Class300
•Class600
Sensor diameter 7/16" (11 mm) 7/8" (22 mm) 1-3/8" (35 mm)
Dim. "D" drilled hole diameter 1/2" (13 mm) 1" (25 mm) 1-1/2" (39 mm)
Flange and welding socket size 1" 1-1/2" 2"
Pipe size "ID" 2" - 6"
(50 mm - 150 mm)
6" - 42"
(150 mm - 1050 mm)
12" - 60"
(300 mm - 1500 mm)
Dim. "X" • Class 300:
approx. 3.56" (90 mm)
• Class 600:
approx. 3.81" (97 mm)
• Class 150:
approx. 3.81" (97 mm)
• Class 300:
approx. 4.06" (103 mm)
• Class 600:
approx. 4.38" (111 mm)
• Class 150:
approx. 4.06" (103 mm)
• Class 300:
approx. 4.31" (110 mm)
• Class 600:
approx. 4.69" (119 mm)
Dim. "H" • Class 300:
approx. 12.0" (305 mm)
• Class 600:
approx. 12.5" (317 mm)
• Class 150:
approx. 14.5" (368 mm)
• Class 300:
approx. 15.1" (383 mm)
• Class 600:
approx. 15.7" (399 mm)
• Class 150:
approx. 16.8" (427 mm)
• Class 300:
approx. 17.4" (441 mm)
• Class 600:
approx. 18.1" (460 mm)

Deltatop DP71B, DP72B, DP73B
20 Endress+Hauser
Process connection: "Flowtap + safety cable"
P01-DP6xBxxx-06-00-00-xx-004
Device head and access valve orientation shown 90 degrees from actual orientation for clarity.
1: Device head
2: Retaining ring
3: Studs and nuts
4: Packing glands
5: Access valve
6: Welding socket
7: Safety cable
!Note!
The wall thickness "W" and the inner diameter "ID" of the pipe have to be specified when ordering a Deltatop
measuring system.
A
A
H
X
W
D
ID
A-A
1
23456
7
DP71B DP72B DP73B
Max. pressure rating 30 psi (2.1 bar) 10 psi (0.7 bar)
Sensor diameter
Not available
7/8" (22 mm) 1-3/8" (35 mm)
Dim. "D" drilled hole diameter 1" (25 mm) 1-1/2" (39 mm)
Welding socket size 1-1/4" NPT 2" NPT
Pipe size "ID" 6" - 42"
(150 mm - 1050 mm)
12" - 60"
(300 mm - 1500 mm)
Dim. "X" (valve) • For steel:
approx. 7.7" (196 mm)
• For 316SS
approx. 7.7" (196 mm)
•Forsteel:
approx. 10.1" (257 mm)
• For 316SS
approx. 8.8" (224 mm)
Dim. "H" - inserted H=ID+W+X+11.7" (279 mm) H=ID+W+X+13.5" (343 mm)
Dim. "H" - retracted H=2(ID+W+X)+11.5" (292 mm) H=2(ID+W+X)+13.2" (335 mm)